Swing bracket for twister and winder spindles



Aug. 12, 1941. o, w, scHAuM SWING BRACKET FOR TWISTER AND WINDER SPINDLES Filed Nov. 22, 1940 3 Sheets-Sheet l O. W. SCHAUM Aug. 12, 1941. 2,252,037

SWING BRACKET FOR TWISTER AND WINDER SPINDLES I Filed Nov. 22, 1940 3 Sheets-Sheet 2 Aug. 12, 1941. o. w. SCHAUM SWING BRACKET FOR TWISTER AND WINDER SPINDLES FiledNov. 22, 1940 3. Sheecs-$heet a x I r 6' Patented Aug. 12, 1941 Sl/VKNG BRACKET FOR TVJISTER AND VVENDER SPINDLES Claims.

This invention relates to swing brackets for supporting the rotatable spindles of twisting, doubling and winding machines on which spools, bobbins or wound packages of textile yarns or filaments are replaceably mounted; and particularly to machines where the axis of each spindle is normally disposed in a substantially vertical position and lies directly below and in axial alignment with a yarn guide, commonly referred to as a pig-tail, through which the yarn runs in its passage .to or from and between the spool etc., on the spindle, and a second remotely situated package onto or from which the yarn is being wound or unwound.

The elevation of the pig-tail guide above the upper extremity of the spindle is, by necessity, less than the axial length of the yarn package spool etc., which is removably carried by the spindle; and the extent of the swinging motion of the bracket from its normal operating position, wherein the spindle is axially aligned with the pig-tail guide and the whorl on the spindle is in contact with the spindle driving belt of the machine, to its inoperative position, wherein the whorl is released from the drive belt and the spindle is laterally displaced from alignment with the pig-tail guide, is normally less than the radius of the head of the spool or package on the spindle.

Under the above noted circumstances, it has been common practice, in designing machines of the character described, to hinge the pig-tail guides individually on the frame of the machine, in order that each guide could be swung out of the way, independently, from its normal operating position above the axis of the spindle, to provide sufficient clearance above the spindle to enable the operator to change the spools or wound packages on the spindles.

Frequently the operator of the machine, after taking a full package off the spindle and placing an empty spool thereon, or vice versa, fails to realign the pig-tail guide with the spindle, which results in improper twisting and winding of the yarn.

The object of the present invention isto provide a new and novel bracket construction by which the spindle, when swung to its inoperative position, will tilt forwardly, at an upwardly divergent angle to the true vertical, sufiiciently to permit the yarn package etc., to clear the pigtail guide while the latter remains in its normal operating position, thereby making it possible to mount the pig-tail guides rigidly on the frame and whereby the possibilitiesof human failure are eliminated.

The construction and operation of the bracket made in accordance with the principles of the present invention will be more fully disclosed hereinafter, reference being had to the accompanying drawings of which:

Figs. 1 and 2 are transverse sectional elevations, respectively, through sumcient of a winding machine to illustrate the operation of a swing bracket made in accordance with the principles of the present invention;

Fig. 3 is a plan view of the swing bracket with the spindle in its normal operating position, as shown in Fig. 1;

Fig. 4 is a plan view similar to Fig. 3, showing the swing bracket and spindle in inoperative position, similar to Fig. 2; and

Fig. 5 is a front View of the bracket in the position of Fig. 1.

In the drawings, a bracket-supporting beam, constituting a part of the frame of a winding machine for example, is illustrated at I. Secured to the beam I, by a bolt 2, is the rigid or fixed section 3 of the present swing bracket. The fixed section 3 is provided with a post 4 on which the movable section 5 of the present swing bracket is pivotally mounted.

The swing bracket 5 supports the bolster '6 for the spindle I, in the usual manner. The spindle I is provided with a whorl 8 which, during normal operation as shown in Fig. l, is in contact with a driving belt 9. When the swing bracket 5 is moved into its inoperative position, as shown in Fig. 2, the whorl B is adapted to make momen+ tary contact with a brake II) after which the whorl is released from the brake, when the swing bracket 5 assumes the position of Fig. 4. The brake It is supported by an arm I I having a split hub I2 which is adjustably mounted on the upper end of the post 4.

The hub 12 serves as an anchorage for one end I3 of a spring M which encircles the post 4 and has its opposite end I5 secured in a collar I6. The collar I6 is adjustably mounted on the swing bracket 5. The spring HI normally maintains the whorl 8 in resilient contact with the drive belt 9. By adjusting the collar It with respect to the swing bracket 5 about the axis of the post I4, the pressure of the whorl 3 against the belt 9 may be readily varied. A set screw I7, threaded into a lug H? which is formed integral with the bracket 5, serves to maintain the collar It in its adjusted position.

The swing bracket 5 is provided with a finger grip or handle I9 by which it may be readily moved into and. out of its normal operating position, as shown in Figs. 3 and 4.

Secured to the stationary bracket 3 is a flat spring 29 which is provided with a pocket 2| for receiving a finger 22. The finger 22 is formed integral with and projects outwardly from the swing bracket 5, for maintaining the swing bracket 5 in its inoperative position, as shown in Figs. 2 and 4, in opposition to the spring 14, which, as noted above, normally tends to return the swing bracket 5 to its normal operative position with the whorl 8 in contact with the drive belt 9.

When the bracket 5 is in its normal operating position, the retaining finger 22 is completely disengaged from the retaining spring 29, as clearly shown in Fig. 3. As the bracket 5 is swung into its inoperative position, the finger 22 engages the curved end am of the flat spring and moves into and past the pocket 2| "in said spring until the whorl 8 engages the brake Hi. When the operator releases the finger grip IS, the spring l4 turns the swing bracket 5 until the finger 22 rests in the pocket 2! of the flat spring 20, thus releasing the whorl 8 from the brake I0.

Directly above and in axial alignment with the spindle I, when the spindle is in normal operating position shown in Fig. 1, is the pig-tail guide 23. In the present instance this guide is rigidly secured to a supporting beam 24 which forms part i of or is attached to the frame of the machine.

As shown in Fig. 1, the yarn or filament a passes from a spool 25, which is frictionally maintained on the spindle i, through the pig-tail guide 23 to a guide 26 which is secured to a longitudinally reciprocating traverse bar 21, by which the yarn a is laid back and forth on the outside of the package A as the package is rotated by contact with a driving drum 29. The drum 29 is secured to the package drive shaft 30 of the machine.

In order that the strands or filaments of which the yarn a is composed will be properly twisted together, as the yarn a passes to and is wound ontothe packageA, the eye 23a of the pig-tail guide 23 must be in axial alignment with the spindle 1; and in order to effect such alignment, the stationary bracket 3 is provided with screws 3i 3 I, which bear against the top and front of the bracket. beam I. By relatively adjusting the screws 3!, prior to finally tightening the bolt 2,

the axis .r-zr of and common to the spindle 1',

the whorl 8, and the bolster 6, is brought into alignment with the axis of the eye 23a of the pig-tail guide 23. When in this position the axis alt-31 is in a substantially true vertical position.

Priorto the present invention, the normal swinging movements of the swing brackets which supported the spindles would be insufficient to permit the upper flanges, for example the flange 25a of the spool 25, to clear the rigid pig-tail guide 23, when lifting the spool 25 ofi the spindle 1, with the swing bracket 5 in its inoperative position. 'In such cases, the axis about which the swing bracket 5 rotated was disposed in parallel relationshipv to the axis wa: of the spindle I and bolster 6. v

In accordance with the principles of the present invention, the axis y-y of the post 4, on which the bracket 5 swings, is disposed at an upwardly diverging angle a with respect to the axis wx, when the spindle l is in its normal operating position. At this time the axis :r-a: is in a true vertical position, or substantially so. This normal relationship is shown in Fig. 5. When the bracket 5 is swung from its normal operative position of Fig. 3, into its inoperative position shown in Fig. 4, the inclination of the pivot axis y-y will cause the axis of the spindle 'I to move out of its truely vertical position .r-x shown in Fig. 1, to an outwardly inclining position, a:'-:c' in upwardly diverging angular relation to the vertical position .r-zc, as shown in Fig. 2, sufiiciently to permit the peripheral edges 25c of the spool heads 25a and 25b to clear the eye 23a of the pig-tail guide 23, when and as the spool 25 is moved upwardly along the spindle 1, in removing the spool from the spindle. This clearance is indicated by the line ww, Fig. 2.

Obviously, by increasing the angle 2 of the pivot axis yy with respect to the spindle axis wx, the clearance between the peripheral edges or surface of the spool or yarn package and the outer extremity of the pig-tail guide eye 23a may be increased to accommodate yarn packages of increased diameter.

As shown in Fig. 5, the pivot post 4 is rigidly secured in a boss 32 forming part of the stationary bracket 3 as, for example, by making the post i a driving fit in the boss 32. The upper end of the boss 32 is recessed as indicated at 33 to form an oil reservoir into which the lower end of the hub is of the swing bracket 5 extends. The bore 35 of the hub 34, through which the post 4 extends, may be provided with spiral oil grooves 36, by which the oil from the cup 33 may pass upwardly and effect lubrication between the bore 35 and post 4.

The swing bracket 5 is provided with the usual whorl latch 3? which is adapted to engage the flange 38 of the whorl 8, to prevent withdrawal of the spindle 1 from the bolster 6 when a yarn package 25 is being removed from the spindle 'I.

As usual, the bolster 6 is resiliently maintained in the swing bracket 5 and rests on a felt cushion 39. The bolster is held firmly but resiliently in place by a spring 40 which encircles the bolster 6 between the underside of the swing bracket 5 and the upper side of a nut 4| which is threaded onto the exterior of the bolster B.

Obviously, the specific details of the structure may be changed or varied to suit conditions without departing from the spirit of the invention or the broad principles thereof which reside primarily in providing a swing bracket by which the spindle of a winding, twisting, or other machine of the same general charactencan be swung from a substantially true vertical position to an outwardly inclined position to permit removal of a yarn package or empty spool therefrom without disturbing the position of the pig-tail guide.

I claim:

1. In a twisting; winding and similar machine, a yarn package spindle normally arranged with its axis in one vertical position, and means supporting said spindle for movement into a second vertical position with its axis in upwardly diverging angular relation to said normal position of said-axis.

2. In a twisting, winding and similar machine, a yarn package spindle normally arranged with its axis in one vertical position, a fixed yarn guide eye in vertical spaced axially aligned relation to said spindle in its said normal position, and means supporting said spindle for movement into a second vertical position with its axis in upwardi a yarn package spindle normally arranged with spindle, a drive belt engaged by said whorl, a brake spaced from said belt, and means supporting said spindle for movement into a second vertical position with its axis in upwardly diverging angular relation to said normal position of said axis with the whorl disengaged from said drive belt and lying adjacent said brake.

4. In a twisting, winding and similar machine, a yarn package spindle normally arranged with its axis in one vertical position, a whorl on said spindle, a drive belt engaged by said whorl, a brake spaced from said belt, and means supporting said spindle for movement into a second vertical position with its axis in upwardly diverging angular relation to said normal position of said axis with the whorl disengaged from said drive belt and lying adjacent said brake, resilient means tending to return said spindle to said normal position, and a resilient catch opposing said return and holding said whorl adjacent said brake.

5. A swing bracket for a yarn package spindle, comprising a stationary section, a swingable section carrying said spindle, and a pivot connecting said sections with the axis of the pivot at an angle to the axis of the spindle.

6. A swing bracket for a yarn package spindle, comprising a stationary section, a swingable section carrying said spindle in a normal vertical position, and a pivot connecting said sections with the axis of the pivot at an upwardly diverging angle to the axis of the spindle.

'7. A swing bracket for a yarn package spindle, comprising a stationary section, a normally horizontal swingable section carrying said spindle in a normally vertical position, a post secured in said stationary section and a hub on said swingable section pivotally mounted on said post, with the axis of the post disposed at an upwardly diverging angle to the axis of the spindle.

8. A swing bracket for a yarn package spindle, comprising a stationary section, a normally horizontal swingable section carrying said spindle in a normally vertical position, a post secured in said stationary section, a hub on said swingable section pivotally mounted on said post, with the axis of the post disposed at an upwardly diverging angle to the axis of the spindle, a whorl on said spindle, a brake for engagement with said whorl and comprising a hub secured to said post above the hub of said swingable section, and a coiled spring encircling said post with its opposite ends respectively secured to said hubs for swinging said movable section in one direction around the axis of the post and relative to said stationary section.

9. A swing bracket for a yarn package spindle, comprising a stationary section, a normally horizontal swingable section carrying said spindle in a normally vertical position, a post secured in said stationary section, a hub on said swingable section pivotally mounted on said post, with the axis of the post disposed at an upwardly diverging angle to the axis of the spindle, a whorl on said spindle, a brake for engagement with said whorl and comprising a hub secured to said post above the hub of said swingable section, a coiled spring encircling said post with its opposite ends respectively secured to said hubs for swinging said movable section in one direction around the axis of the post and relative to said stationary section, a flat spring secured to one of said sections, and a finger on the other of said sections engageable in a pocket formed in said flat spring to resist said rotation of said swingable section by said coiled spring.

10. A swing bracket for a yarn package spindle, comprising a stationary section, a normally horizontal swingable section carrying said spindle in a normally vertical position, a post secured in said stationary section, a hub on said swingable section pivotally mounted on said post, with the axis of the post disposed at an upwardly diverging angle to the axis of the spindle, a whorl 'on said spindle, a brake for engagement with said whorl and comprising a hub secured to said post above the hub of said swingable section, a coiled spring encircling said post with its opposite ends respectively secured to said hubs for swinging said movable section in one direction around the axis of the post and relative to said stationary section, a flat spring secured to one of said sections, a finger on the other of said sections engageable in a pocket formed in said flat spring to resist said rotation of said swingable section by said coiled spring, means for adjustably securing said brake hub to said post to secure the brake in a predetermined position to said whorl as determined by the engagement of said finger in the retaining pocket of said flat spring whereby the end of the coiled spring secured to the brake hub is moved circumferentially of said post, and means for adjusting the opposite end of said coiled spring about said post and relative to the hub of said swingable section to produce a predetermined effective tension in said coiled spring.

OTTO W. SCHAUM. 

